Steam-engine valve.



No. 701,420. Patented June 3, I902.

A. TANDLER.

STEAM ENGINE VALVE.

(Application filed Sept 26, lQOL) (No Model.) 3 Sheefs8h0et I.

YHE NORRXS PETERS cu. FHQTO-LITHO.,WASHINGTQN, a c,

No. 70|,420. Patented June 3, I902.

A. TANDLER.

b STEAM ENGINE VALVE.

(Application filed Sept. 26, 1901.) (No Model.) 3 Sheets-Sheet :2.

No. 701,420. Patented June 3, I902.

A. TANDLEH.

STEAM ENGINE VALVE.

(Application filed Sept. 26, 1901.) (No Model.) 3 Sheets-Sheel 3.

1 I M* A UNITED STATES ATENT OFFICE.

ANTONE TANDLER, OF CHICAGO, ILLINO IS.

STEAM-ENGINE VALVE.

SPECIFICATION forming part of Letters Patent No. 701,420, dated June 3, 1902. Application filed September 26, i901. Serial No. 76,674. (No model.)

To a whom it may concern:

Be it known that I, ANTONE TANDLER, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented certain new. and useful Improvements in Steam-Engine Valves, of which the following is a specification.

One of the objects of this invention is the production of animproved slide-valve, for

steam-engines.

A further object is to provide a closed chamberin asteam-valve to cushion endwise movement of the piston exhaust-valve therein.

A further object is to provide means adapt removing them therefrom for cleaning or re-" palr.

In the accompanying drawingsdrigure 1 is a longitudinal vertical central section through a slide-valve embodying the features of my invention, showing also a steam-cylinder in central section and the piston-head therein, though it will be understood that the sectional plane of the steam-valve is not the same as that of the cylinder. The parts are repre sented to be in their initial or starting position-that position which they assume before the steam-cushions at one end of the piston exhaust-valves have been formed. Fig. 2 is an enlarged View somewhat similar to the preceding one, but representing the parts in an operative position. Fig. 3 is a longitudinal horizontal central section through the slide-valve proper, showing two piston exhaust-valves in place therein. Fig. 4 is an end View of the slide-valve proper, showing the means for securing the piston exhaustvalves in said slide-valve. Fig. 5 is a bottom plan view of the slide-valve proper.

Like letters of reference indicate corresponding parts throughout the several views.

In the steam-valve illustrated in the drawthreaded to receive the guide-plugs E ings, A designates the steam-cylinder, A and A the steam-ports, and A the piston-head.

B is the slide-valve proper, having a central exhaust-port B and two each of the 1ongitudinal alined openings B and B communicating with said exhaust-port and forming two longitudinal bores for said slide-valve. The outer ends of the alined openings B and B are closed by the inserted bushings B frictionally held within their seats in the openings B and B and internally screw- The annular Walls of the bushings B are provided with inlet-openings B for live steam, and the plugs B eachihave a coinciding opening 13 extending transversely therethrough, also a circumferential groove B and an axial opening B communicating between the transverse opening B and .theinuer end of each of the plugs B The plugs B are also provided with central screw-threaded depressions E for receiving a screw-threaded rod (not shown) to permitthewithdrawal of said bushings. Near their inner ends the alined openings 13 and B are counterbored at B, and these counter- .bored recesses communicate with the steamare provided at their ends with the projecting annular walls 0, forming a chamber 0 in each end of said valves. These chambers C are adapted to receive the guide-plugs E the thickness of their surrounding walls 0 being just sufficient to fill the space between the bushings B and the guide-plugs B The annular walls 0, surrounding the chambers C are perforated at diametrically opposite sides by the ducts 0?, (connected by a circular groove on the periphery of the walls C,) and when the piston exhaust-valve is at the end of its stroke the ports'O coincide with the ports 13 of the bushings B and the axial opening B in each of the plugs B permits the live steam to enter the chambers 0 two of which latter at one side of the slide-valve are thereby supplied with live steam at every movement of the slide-valve. An axial duct 0 extends longitudinally through each of said exhaust-valves and forms a communication between the chambers O at the opposite ends of said valves. The peripheral flanges C at either end of the piston exhaust-valves O fit closely within the alined openings B and B opening and closing the exhaust-ports B in communication with the steam-ports A and A respectively, by the movement of said piston-valves.

In operation the quick reciprocation of the slide valve B throws the piston exhaustvalves 0, by reason of the inertia of the latter, forward and backward within the alined openings 13 and B The valves C are guided upon the plugs B and their movement is cushioned by the steam-chambers O at their opposite ends. When both of the valves are in the position shown in Fig. 2 of the drawings, the exhaust-ports B are in communication with the steam-port A and the exhaust-steam is free to escape from this end of the cylinder. In said Fig. 2 the slide-valve is represented as moving from right to left,

- the exhaust-port B being in communication with the steam-ports A and the steam-chambers (J at the left-hand ends of the two piston exhaust-valves in communication with live steam in the slide-valve casing through the openings 13", B and B. As soon as the movement of the slide-valve is reversed the steam within the chambers O at the left-hand end of said valves C is compressed and forced out through the axial ducts G into the corresponding chambers C at the right-hand end of said exhaust-valves. The communication between the chambers C and the live-steam openings B is interrupted. The exhaustvalves 0 instantly are thrown to the extreme left, Fig. 2, opening the exhaust ports B which will be placed into coincidence with the steam-ports A by the continued movement of the slide-valve B. During the movement of the slide-valve from left to right the valves 0 are caused to move (relatively) from right to left, and at the extremity of the stroke of the slide-valve the exhaust-valves occupy such a position that thelive-steam openings 13 are in coincidence with the steam-ducts B whereby the chambers C are for an instant under direct boiler-pressure. 'Ihe ducts B maintain the annular chambers B under the pressure of that end of the steamcylinder with which they are connected.

The slide-valve B operates to open and close the steam-ports A and A in the usual manner.

While I have herein shown and described two piston exhaust-valves, it is clear that any number may be used, depending upon the size of the cylinder.

I claim as my invention 1. In a valve for steam-engines, in combination, a slide-valve proper, having a steamport and an exhaust-port; a piston exhaustvalve loosely mounted in said slide-valve and adapted to open and close the exhaust, said piston-valve being provided with a chamber at one of its ends a duct in said valve for conveying live steam to said chamber; and a duct in said piston exhaust-valve adapted to be brought into coincidence with said firstmentioned duct by the movement of said piston-valve.

2. In a valve for steam-engines, in combination, a slide-valve proper, having steamports, an exhaust-port, and a longitudinal opening; a piston exhaust-valve free to move longitudinallyin said opening and adapted to open and close the exhaust by its said movement, said piston-valve being provided with a chamber at one of its ends; a closure for one end of said longitudinal opening; a duct in said closure for conveying live steam to said chamber; and a duct in said piston exhaust-valve adapted to be brought into coincidence with the duct in said closure by the movement of said piston-valve.

3. In a valve for steam-engines, in combination, a slide-valve proper, having a steamport and an exhaust-port; a piston exhaust.- valve loosely mounted in said slide-Valve and adapted to open and closethe exhaust, said piston-valve being provided with a chamber at one of its ends; means of communication between said chamberand the boiler-pressure within the valve; means for opening and closing said communication; and a means of escape for the steam within said chamber.

4. In a valve for steam-engines, in combination, a slide-valve proper, having a steamport and an exhaust-port; a piston exhaustvalve loosely mounted in said slide-Valve and adapted to open and close the exhaust, said piston-valve being provided with a chamber at one of its ends; a duct in said valve for conveying live steam to said chamber; a duct in said piston exhaust-valve adapted to be brought into coincidence with said first-mentioned duct by the movement of said pistonvalve; and a second duct in said piston-valve for the escape of the steam within said chamher.

5. In a valve for steam-engines, in combination, a slide-valve proper, having steamports, an exhaust-port, and a longitudinal opening; a piston exhaust-valve free to move longitudinally in said opening and adapted to open and close the exhaust by its said movement, said piston-valve beingprovided with a chamber at one of its ends; a closure for one end of said longitudinal opening; a duct in said closure for conveying live steam to said chamber; a duct in said piston exhaustvalve adapted to be brought into coincidence with the duct in said closure by the movement of said piston-valve; and a second duct in said piston-valve for the escape of the steam within said chamber.

6. In a valve for steam-engines, in combination, a slide-valve proper, having a steam port and an exhaust-port; a piston exhaustvalve loosely mounted in said slide-valve and adapted to open and close the exhaust, said piston-valve being provided with a chamber at each of its ends; means of communication between each of said chambers and the boilerpressure within the valve; means for opening and closing said communication; and a means of communication between said chambers.

7. In a valve for steam-engines, in combination, a slide-valve proper, having a steamport and an exhaust-port; a piston exhaustvalve loosely mounted in said slide-valve and adapted to open and close the exhaust, said piston-valve being provided with a chamber at each of its ends; a duct in said valve for each of the chambers,for conveying live steam to said chambers; a duct in each end of said piston-valve adapted to be brought into coincidence with one of said first-mentioned ducts by the movement of said piston-valve; and a means of communication between said chambers.

8. In a valve for steam-engines, in combination, a slidevalve proper, having steamports, an exhaust-port, and a longitudinal opening; a piston exhaust-valve free to move longitudinally in said opening and adapted to open and close the exhaust by its said movement, said piston-valve being provided with a chamber at each of its ends; a closure for each end of said longitudinal opening; a duct in each end of said piston -valve adapted to be brought into coincidence with the duct in one of said closures by the movement of said piston-valve; and a means of communication between said chambers.

9. In a valve for steam-engines, in combination, a slide-valve proper having steamports, an exhaust port and a longitudinal opening; a piston exhaust-valve free to move longitudinally in said opening and adapted to open and close the exhaust by its said in ovement; a closure for each end of said longitudinal opening, said piston exhaust-valve being provided at its opposite ends with steamchambers adapted to cushion the endwise movement of said exhaust-valve, and a connecting-duct between said chambers; and a projection extending from each of said closures for entering one of the said steam-chambers in the piston exhaust-valve.

10. In a valve for steam-engines, in combination, a slide-valve proper having steamports, an exhaust-port and a longitudinal opening; a piston exhaust-valve free to move longitudinally in said opening and adapted to open and close the exhaust by its said movement, said piston exhaust-valve being provided in its opposite ends with steamchambers; means of communication between said steam-chambers and the boiler-pressure within said valve; closures for the ends of said longitudinal opening, each of said closures being provided With a guide plug adapted to enter the adjacent steam-chamher in the piston exhaust-valve and a duct in said piston valve communicating between said chambers.

11. In a valve for steam-engines, in combination, a slide valve proper having two steam-ports, an exhaust-port and a longitudinal opening; a piston exhaust valve of spool form, free to move in said longitudinal opening and adapted to open and close the exhaust by its said movement, said piston exhaust-valve being provided at its opposite ends with projecting annular Walls to form chambers to cushion the endwise movement of said exhaust-valve; a closure adapted to enter said chambers; and a duct in said piston-valve communicating between said chanrbers.

12. In a valve for steam-engines, in combi nation, a slide-valve proper having two steamports, an exhaust-port and a longitudinal opening, said longitudinal opening being counterbored on opposite sides of the exhaust-port and provided with means of communication with each of said steam-ports; a piston exhaust-valve free to move longitudinally' in said opening and adapted to open and close the exhaust by its said movement, said piston exhaust-valve having at its opposite ends annular walls to form steam-chambers in each end of said piston-valve; means of communication between each of said cham bers and the boiler-pressure in the steamchest; closures for the opposite ends of said longitudinal opening, said closures being provided with guide-plugs adapted to enter said steam-chambers in the piston exhaust-valve and a duct in said piston-valve communicating between said chambers.

13. In a valve for steam-engines, in combination, a slide-valve proper having steamports, an exhaust-port, and two longitudinal openings communicating with the exhaustport; closures for the opposite endsof said openings; a piston exhaust valve free to move longitudinally in each of said openings and adapted to open and close the exhaust by its said movement, each of said piston exhaust-valves being provided at its opposite ends with steam-chambers adapted to cushion the endwise movement of said exhaust valves; a guide-plug extending from each of said closures adapted to enter the chamber in one of said piston exhaust-valves; and a connecting-duct in each piston-valve for connecting the chambers in the opposite ends thereof.

ANTONE TANDLER.

\Vitnesses:

L. L. MILLER, GEo. L. OHINDAHL. 

